The Collaborative International Dictionary of English v.0.48:

Jacket \Jack"et\, v. t.
   1. To put a jacket on; to furnish, as a boiler, with a
      jacket.
      [1913 Webster]

   2. To thrash; to beat. [Low]
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Jacket \Jack"et\, n. [F. jaquette, dim. of jaque. See 3d Jack,
   n.]
   [1913 Webster]
   1. A short upper garment, extending downward to the hips; a
      short coat without skirts.
      [1913 Webster]

   2. An outer covering for anything, esp. a covering of some
      nonconducting material such as wood or felt, used to
      prevent radiation of heat, as from a steam boiler,
      cylinder, pipe, etc.
      [1913 Webster]

   3. (Mil.) In ordnance, a strengthening band surrounding and
      re["e]nforcing the tube in which the charge is fired.
      [1913 Webster]

   4. A garment resembling a waistcoat lined with cork, to serve
      as a life preserver; -- called also cork jacket.
      [1913 Webster]

   Blue jacket. (Naut.) See under Blue.

   Steam jacket, a space filled with steam between an inner
      and an outer cylinder, or between a casing and a
      receptacle, as a kettle.

   To dust one's jacket, to give one a beating. [Colloq.]
      [1913 Webster]

WordNet (r) 3.0 (2006):

jacket
    n 1: a short coat
    2: an outer wrapping or casing; "phonograph records were sold in
       cardboard jackets"
    3: (dentistry) dental appliance consisting of an artificial
       crown for a broken or decayed tooth; "tomorrow my dentist
       will fit me for a crown" [syn: crown, crownwork,
       jacket, jacket crown, cap]
    4: the outer skin of a potato
    5: the tough metal shell casing for certain kinds of ammunition
    v 1: provide with a thermally non-conducting cover; "The tubing
         needs to be jacketed"
    2: put a jacket on; "The men were jacketed"

Moby Thesaurus II by Grady Ward, 1.0:

159 Moby Thesaurus words for "jacket":
   Eton jacket, Leatherette, Leatheroid, Mao jacket, Smyth sewing,
   backing, bandage, bandaging, bark, bibliopegy, binder,
   binder board, binding, blazer, blouse, body coat, bolero,
   bomber jacket, bonnet, book cloth, book cover, book jacket,
   bookbinding, bookcase, boot, bran, breech, cap, capsule, capuchin,
   car coat, case, casemaking, casing-in, chaff, chaqueta,
   chesterfield, claw hammer, claw-hammer coat, cloak, coat, coif,
   collating, collating mark, corn shuck, cornhusk, cover,
   cutaway coat, cuticle, dermis, dinner jacket, doublet, dress coat,
   duffel, dust cover, dust jacket, envelope, envelopment, fell,
   fingertip coat, fitted coat, fleece, flesh, folding, footband,
   frock, frock coat, fur, furring, gathering, gift wrapping,
   gluing-off, gown, greatcoat, hard binding, hat, headband, hide,
   hood, hull, husk, imitation fur, imitation leather, integument,
   jerkin, jumper, jupe, leather, leather paper, library binding,
   lining, lining-up, loden coat, mackinaw, mantle,
   mechanical binding, mess jacket, midicoat, monkey jacket,
   niggerhead, outer layer, outer skin, overcoat, palea, parka,
   pea jacket, peel, pelt, peltry, perfect binding, plastic binding,
   pod, rawhide, reefer, rind, rounding, sack, saddle stitching,
   san benito, sewing, sheath, shell, shirt, shoe, shuck, side sewing,
   signature, ski jacket, skin, skins, sleeve waistcoat, slipcase,
   slipcover, smashing, smoking jacket, sock, soft binding,
   spiketail coat, spiral binding, stamping, stapling, stocking,
   swallowtail, tabard, tail coat, tailband, tails, tegument, tipping,
   topcoat, trimming, vair, watch coat, windbreaker, wire stitching,
   woolly, wrap, wrapper, wrapping